package com.gilight.base.util;

import org.apache.commons.lang3.StringUtils;
import org.lionsoul.ip2region.DataBlock;
import org.lionsoul.ip2region.DbSearcher;

import javax.servlet.http.HttpServletRequest;

/**
 * @author xuhs
 * @description ID地址获取工具类
 * @date 2019/10/17
 */
public class IPUtils {
    /**
     * 获取IP地址
     *
     * 使用Nginx等反向代理软件， 则不能通过request.getRemoteAddr()获取IP地址
     * 如果使用了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP地址，X-Forwarded-For中第一个非unknown的有效IP字符串，则为真实IP地址
     */
    public static String getIpAddr(HttpServletRequest request) {
        String ip = null;
        try {
            ip = request.getHeader("x-forwarded-for");
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("Proxy-Client-IP");
            }
            if (StringUtils.isEmpty(ip) || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("WL-Proxy-Client-IP");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_CLIENT_IP");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_X_FORWARDED_FOR");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getRemoteAddr();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

//        //使用代理，则获取第一个IP地址
//        if(StringUtils.isEmpty(ip) && ip.length() > 15) {
//			if(ip.indexOf(",") > 0) {
//				ip = ip.substring(0, ip.indexOf(","));
//			}
//		}

        return ip;
    }
    /**
     * 根据ip获取详细地址
     */
    public static String getCityInfo(String ip) {
        try {
            DbSearcher searcher = DbSearchBuilder.getInstance();
            DataBlock dataBlock= searcher.memorySearch(ip);
            String address = dataBlock.getRegion().replace("0|","");
            if(address.charAt(address.length()-1) == '|'){
                address = address.substring(0,address.length() - 1);
            }
//            String [] aa = address.split("\\|");
            return address.equals(REGION)?"内网IP":address;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "";
    }
    /**
     * 用于IP定位转换
     */
    static final String REGION = "内网IP|内网IP";


    public static void main(String [] args){
        IPUtils.getCityInfo("192.168.100.173");
    }
}
